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COMEDK2016MathematicsMathematical Reasoning

If a (b+c) and a (b-c) , where a, b, c N , then

Options

  1. Ac² a² ( b² )
  2. Ba² b² ( c² )
  3. Ca²+c²-b²
  4. Db² c² ( a² )

Correct answer

D. b² c² ( a² )

Step-by-step solution

b c( a) So, b+c a and b-c a = (b+c)(b-c) a² = b²-c² a² or a² b²-c² Here, b² c² ( a² )

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